Against Ragna, Noel, Jin, Carl, Litchi, Tager, Bang, Haku Mirrors, Tsubaki, Mu, and Makoto use an airdash approach and A Falling attack, normally j.5B or j.2C.
Against Tao and Valk, Bait them into a 4D combo.
Against Rachel, Arakune, Lambda, Hazama, and Plat, Approach with a j.2C that is used As you are airdashing to orbify their projectiles. (Since those 5 characters have projectiles that get in the way of your airdash)
Also, I've seen this used on me way to many times.
Corner: 623AA>(JC)>j.2C(Falling)>2C>j.5A>j.5A>airdash>j.5A>j.5C>j.214B>j.5A>j.5C>(Now you have a choice)
Option 1: J.214C
Option 2: Gold Burst and repeat starting at the 2C
Option 3:RC j.5A>j.5C
Option 4: Just end the combo.
Heres some of my Litchi Practice: